Scared of heights? Then you’ll want to avoid the glass bridge on Tianmen Mountain in Zhangjiajie, China. Built into the side of Tianmen Mountain, the bridge is 4,700 feet off the ground. Tourists who walk the bridge are required to put on special shoe covers to help keep the glass floor clean. We imagine it’s not a job many cleaners would be excited to take. Take a look and let us know in the comments if you’d be willing to walk the glass bridge.